More work

src/level.rs

@@ -1,5 +1,7 @@
 use std::cmp::{max, min};
-use crate::artifacts::{Artifact, Chest, Potion};
+use crate::artifacts::Artifact;
+#[cfg(test)]
+use crate::artifacts::{Chest, Potion};
 use crate::monster::Monster;
 use crate::position::Position;